Belkin PM11-UL/RAMA User Manual page 83

3
Award BIOS Setup Utility
PCI Slot 1 Use IRQ to PCI Slot 3 Use IRQ
By default, an IRQ is automatically assigned to the PCI devices that
are installed in the PCI slots.
If a PCI device has not been assigned an IRQ, you must manually
assign an IRQ for the device. During system boot-up, you will see
“NA” for the device that does not have an IRQ assigned.
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